In which of the following CRUD operations can you specify a write concern? Select all that apply.

• A.db.collection.update()
• B.db.collection.find()
• C.db.collection.insert()
• D.db.collection.updateMany()
• E.db.collection.insertOne()

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Data modeling. You are considering the use of nesting or references in your data model. Your data may change frequently. Which option would be more appropriate?

• A.Use of nesting.
• B.Use of reference.

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Suppose you are connected to mongod instance that is already running on port 27000 as admin user. You have to create a new user for an application that has the readWrite role. Use the db.createUser() command to create a user for data analysis. The requirements for this user are: -> role: read on esmartdata database -> username: dataScientist -> password: ds123sci456 Which command should you use?

• A.db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'write', db: 'esmartdata'}] })
• B.db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'read', db: 'esmartdata'}] })
• C.db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'r', db: 'esmartdata'}] })
• D.db.createUser({ user: 'dataScientist', pwd: 'ds123sci456', roles: [{role: 'read', db: ''}] })

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You have the following index in a movies collection: { "title": 1, "imdb.rating": -1, "imdb.votes": -1, "type": 1 } Can the following query use the given index for both filtering and sorting?
db.movies.find( { "title": { "$lt": "M" } } ).sort( { "imdb.votes": -1 } )

• A.Yes
• B.No

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Does MongoDB support query operations that perform a text search of string content?

• A.Yes
• B.No

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